I have a 2002 Honda civic ex 1.7 4 CL, i have the check engine light on, i have changed the 2 O2 sensor, i have check for leaks and there is not leaks. i found something funny about my EGR. if i put carb cleaner in my egr which look like the one in the picture, my engine start choking and wants to turn off, now after it gets normal if i unplug egr the cable there is no difference in the idle; if the EGR is good is there any difference if you unplug the cable from it?